{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:34:48.609377", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2023-Apr-06_to_2023-Apr-10_355.0_13.0"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2023040000325}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "April 06 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 10 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 130020.65378704258}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Burkina Faso", "Ghana", "Mali"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 13.0}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 355.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "355.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 352.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 358.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 10.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 13.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.25, 12.5], [-7.03, 13.03], [-6.5, 13.25], [-6.25, 13.15], 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13.25], [-3.25, 13.15], [-3.0, 13.25], [-2.75, 13.15], [-2.5, 13.25], [-1.97, 13.03], [-1.75, 12.5], [-1.85, 12.25], [-1.82, 12.18], [-1.47, 12.03], [-1.25, 11.5], [-1.35, 11.25], [-1.25, 11.0], [-1.35, 10.75], [-1.25, 10.5], [-1.47, 9.97], [-2.0, 9.75], [-2.25, 9.85], [-2.5, 9.75], [-2.75, 9.85], [-3.0, 9.75], [-3.25, 9.85], [-3.5, 9.75], [-4.03, 9.97], [-4.2, 10.38], [-4.5, 10.25], [-5.03, 10.47], [-5.18, 10.82], [-5.25, 10.85], [-5.5, 10.75], [-5.75, 10.85], [-6.0, 10.75], [-6.53, 10.97], [-6.75, 11.5], [-6.65, 11.75], [-6.68, 11.82], [-7.03, 11.97], [-7.25, 12.5], [-7.15, 12.75], [-7.25, 13.0], [-7.03, 13.53]]]]}, "2023-04-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.75, 13.5], [-7.53, 14.03], [-7.0, 14.25], [-6.47, 14.03], [-6.32, 13.68], [-6.2, 13.62], [-6.03, 14.03], [-5.5, 14.25], [-5.0, 14.04], [-4.5, 14.25], [-3.97, 14.03], [-3.75, 13.5], [-3.87, 13.2], [-3.75, 13.15], [-3.5, 13.25], [-3.25, 13.15], [-3.0, 13.25], [-2.75, 13.15], [-2.5, 13.25], [-1.97, 13.03], [-1.75, 12.5], [-1.85, 12.25], [-1.82, 12.18], [-1.47, 12.03], [-1.25, 11.5], [-1.35, 11.25], [-1.25, 11.0], [-1.35, 10.75], [-1.25, 10.5], [-1.47, 9.97], [-2.0, 9.75], [-2.25, 9.85], [-2.5, 9.75], [-2.75, 9.85], [-3.0, 9.75], [-3.25, 9.85], [-3.5, 9.75], [-4.03, 9.97], [-4.2, 10.38], [-4.5, 10.25], [-5.03, 10.47], [-5.18, 10.82], [-5.25, 10.85], [-5.5, 10.75], [-5.75, 10.85], [-6.0, 10.75], [-6.53, 10.97], [-6.75, 11.5], [-6.65, 11.75], [-6.68, 11.82], [-7.0, 11.96], [-7.5, 11.75], [-8.03, 11.97], [-8.25, 12.5], [-8.03, 13.03], [-7.68, 13.18], [-7.65, 13.25], [-7.75, 13.5]]]]}, "2023-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.75, 13.5], [-7.53, 14.03], [-7.0, 14.25], [-6.47, 14.03], [-6.32, 13.68], [-6.2, 13.62], [-6.03, 14.03], [-5.5, 14.25], [-5.0, 14.04], [-4.5, 14.25], [-3.97, 14.03], [-3.75, 13.5], [-3.97, 12.97], [-4.32, 12.82], [-4.35, 12.75], [-4.25, 12.5], [-4.47, 11.97], [-5.0, 11.75], [-5.53, 11.97], [-5.68, 12.32], [-5.8, 12.38], [-5.97, 11.97], [-6.5, 11.75], [-7.0, 11.96], [-7.5, 11.75], [-8.03, 11.97], [-8.25, 12.5], [-8.03, 13.03], [-7.68, 13.18], [-7.65, 13.25], [-7.75, 13.5]]]]}, "2023-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.75, 13.5], [-7.53, 14.03], [-7.0, 14.25], [-6.47, 14.03], [-6.25, 13.5], [-6.35, 13.25], [-6.25, 13.0], [-6.47, 12.47], [-6.82, 12.32], [-6.97, 11.97], [-7.5, 11.75], [-8.03, 11.97], [-8.25, 12.5], [-8.03, 13.03], [-7.68, 13.18], [-7.65, 13.25], [-7.75, 13.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.7335362326764425}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.132806727105779}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [29.118293273696395, 29.998420066542337, 28.833380411040764, 30.64872919698837, 30.718295867257382]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.2448817247365, 28.80069001140936, 26.9877635113682, 29.694728886139785, 30.47536307721373]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.3998773090646823, -2.542514633213628, -3.720306965412303, -2.272899940920746, -2.155016673064589]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.7335362326764425, -3.0056418590986027, -5.275678697177568, -2.9541192269286967, -2.3105739768314493]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.3303086672652267, -1.7317060917054168, -2.5657630579297943, -1.5790056248525532, -1.5077956326757356]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.652569854923808, -2.096930039180572, -3.7319294505847536, -2.0109136429994225, -1.7201012779898448]}}